350 PROCEEDINGS OF THE ACADEMY OF 



August 26. 

 The President, Dr. Ruschenbekger, in tlie chair. 

 Sixteen members present. 



September 2. 

 The President, Dr. Ruschenberger, in the' chair. 

 Twenty-five members present. 



September 9. 

 The President, Dr. Ruschenberger, in the chair. 

 Twent^'-eight members present. 



Mr. Gentry communicated a notice of a great swarm of ephe- 

 nierids which passed through the town of Lewisburg, on the 

 Susquehanna River, on the afternoon of the 22d of August. Tlie 

 swarm was estimated to be about a mile in length by nearly a half 

 mile in width, and was so dense as even to obscure passers-by on 

 the opposite side of the street. 



September 15. 

 The President, Dr. Ruschenberger, in the chair. 

 Twenty-seven members present. 



The following papers were presented for publication: "On a 

 new American species of Glyptocephalus." By Theo. Gill. "De- 

 scription of fifty -two species of Unionida?." By Isaac Lea. 



The last-named paper was, on report of the committee, ordered 

 to be published in the Journal of the Academy. 



September 23. 

 The President, Dr. Ruschenberger, in the chair. 

 Twenty-five members present. 



E.rcepHonal CoiuHlionf! ii} the Vegetntion of Forest Seed. Mr. 

 Thomas Mkkhan, in rcfcrenre to the distribution of the Conifin^ 

 of the Rocky Mountains, said, that in any forest it must have 



